W. Va. 
Ariz. 
Ark. 
ell- 


Chemical Characterization of the fem veanepel ene Sub= 
characterize chemically the substance responsible for tered te 
repellent activity of mahogany wood. 
Nutr., Ent., Biochem. , Med. 83 
Factors Affecting Natural Regeneration in Upland Oak Types. 
To (1) test various types of reproduction cuttings in evenaged 
and unevenaged upland oak stands on various sites, in order to 
determine which methods of cutting are most applicable to ob- 
taining oak regeneration in these forest types; (2) determine 
most important species of harmful and beneficial insects affect- 
ing natural regeneration of upland oaks; and ascertain nature 
of some of their ecological relationships to the forest; and 
(3) determine effect and relative importance of rodents and 
animals other than insects, depth of litter, and compactness 
of surface soil on viability and germination of acorns. 
For., Pl. Path. 67 
E. Stored Grain, Household and Food Insects 
The Biology and Food Preferences of the Khapra Beetle as 
They Relate to Grain Marketability. Obtain basic information 
on biology, ecology, and economic injury of khapra beetle under 
conditions prevailing in the southwest. 
Ent., Agron. 389 (WM-16) Coop. AMS 
Improved Marketing of Grains Through Insect Control. To 
(1) investigate kinds of insects damaging cash grain in farm 
storage and evaluate the effects on quality and market value 
of the grain; (2) determine sources of infestations and factors 
favoring population increases and correlate cost of controlling 
these factors; (3) determine importance of various species and 
evaluate factors contributing to their development; and (4) 
determine better methods for direct and indirect controls and 
evaluate these in terms of cost, change in quality, and market 
value. 
Int., Econ., Sociol. 391 
